Bump rack from 2.2.12 to 2.2.13

Bumps [rack](https://github.com/rack/rack) from 2.2.12 to 2.2.13.
- [Release notes](https://github.com/rack/rack/releases)
- [Changelog](https://github.com/rack/rack/blob/main/CHANGELOG.md)
- [Commits](rack/rack@v2.2.12...v2.2.13)

---
updated-dependencies:
- dependency-name: rack
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

Gemfile.lock

@@ -152,7 +152,7 @@ GEM
       stringio
     public_suffix (6.0.1)
     racc (1.8.1)
-    rack (2.2.12)
+    rack (2.2.13)
     rack-livereload (0.3.17)
       rack
     rainbow (3.0.0)